Structure and Properties of Novel Mixed Organics Hybrid Lead-Halide Phase (1-NA)(1-MQ)Pb₂I₆

Low dimensional hybrid organic-inorganic lead-halide structures are gaining interest due to their structural flexibility and tunability compared their parent 3-D perovskite structure. By combining the tunability of organic chromophores and the desirable optical properties of perovskites, we aim to develop a new portfolio of hybrid organic-inorganic lead-halide materials. In order to achieve a mixed organics hybrid lead-halide phase, several 1-naphthylamine isomers were used to synthesize new 1-D hybrids to screen for similar crystal structures to the known 1-D hybrid, 1-naphthylammonium lead iodide (1-NA)PbI₃. 1-methylquinolinium iodide (1-MQ)PbI₃ has a similar structure, and a mixed organics hybrid phase, (1-NA)(1-MQ)Pb₂I₆ is successfully synthesized. (1-NA)(1-MQ)Pb₂I₆ shows clear ordering of the organics, which is the first we are aware of in these systems. We will discuss the optical and dielectric properties of the end members, (1-NA)PbI₃ and (1-MQ)PbI₃, as well as the mixed organics hybrid phase, (1-NA)(1-MQ)Pb₂I₆, and how that relates to their respective structures.